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git_connect: let user override virtual-host we send to daemon

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When we connect to a git-daemon at a given host and port, we
actually send the string "localhost:9418" to the other side,
which allows it to do virtual-hosting lookups. For testing
and debugging, we'd like to be able to send arbitrary
strings, rather than the hostname we actually connected to.

Using "insteadOf" config does not work for this purpose, as
the hostname determination happens at a very low level,
right before we feed the hostname to our lookup routines.
You could use /etc/hosts or similar to get around this, but
we cannot do that portably from our test suite.

Instead, this patch provides an environment variable that
can be used to send an arbitrary string.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2015-02-17 03:37:35 -05:00 committed by Junio C Hamano
parent 3c84ac86fc
commit 94bc83c593
1 changed files with 11 additions and 1 deletions
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12
connect.c
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@ -673,10 +673,20 @@ struct child_process *git_connect(int fd[2], const char *url,
printf("Diag: path=%s\n", path ? path : "NULL");
conn = NULL;
} else if (protocol == PROTO_GIT) {
/*
* Set up virtual host information based on where we will
* connect, unless the user has overridden us in
* the environment.
*/
char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST");
if (target_host)
target_host = xstrdup(target_host);
else
target_host = xstrdup(hostandport);
/* These underlying connection commands die() if they
* cannot connect.
*/
char *target_host = xstrdup(hostandport);
if (git_use_proxy(hostandport))
conn = git_proxy_connect(fd, hostandport);
else